I've a 2004 Pacifica as a daily ride, it needs a rear driver side brg ass'y. NAPA cost is $356 CDN, found one on carjunky.com for $138 US with Timkin Brg ass'y . Is this a good deal or is quality a problem, and whats involved to change this? I've never pulled a new rear axle before, it's all wheel drive......thx.....dk